Acoustic panel



FIG. 1 is a top, front, left side perspective view of an acoustic panel;

FIG. 2 is a top, front, right side perspective view thereof;

FIG. 3 is a top, back, left side perspective view thereof;

FIG. 4 is a top, back, right side perspective view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a front elevational view thereof;

FIG. 7 is a back elevational view thereof;

FIG. 8 is a left side elevational view thereof; and,

FIG. 9 is a right side elevational view thereof.

The broken lines shown in FIGS. 1-9 illustrate portions of the acoustic panel that form no part of the claimed design. The bottom side of the acoustic panel is disclaimed and forms no part of the claimed design. 

CLAIM The ornamental design for an acoustic panel, as shown and described. 